6566445664 has 12 divisors (see below), whose sum is σ = 12927689964. Its totient is φ = 3283222816.

The previous prime is 6566445661. The next prime is 6566445667. The reversal of 6566445664 is 4665446656.

It is an interprime number because it is at equal distance from previous prime (6566445661) and next prime (6566445667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566445661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102600682 + ... + 102600745.

It is an arithmetic number, because the mean of its divisors is an integer number (1077307497).

Almost surely, 2^6566445664 is an apocalyptic number.

It is an amenable number.

6566445664 is a deficient number, since it is larger than the sum of its proper divisors (6361244300).

6566445664 is a wasteful number, since it uses less digits than its factorization.

6566445664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205201437 (or 205201429 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 52.

The square root of 6566445664 is about 81033.6082375702. The cubic root of 6566445664 is about 1872.5932416197.

The spelling of 6566445664 in words is "six billion, five hundred sixty-six million, four hundred forty-five thousand, six hundred sixty-four".